A survey released Tuesday by the Americans for Civil Liberties Union found that Connecticut police departments can make filing a complaint against an officer a difficult process and in some cases they discouraged inquiries about the process through intimidation.

The poll was based on a phone survey of 104 Connecticut law enforcement agencies, of which 92 were municipal police departments and 12 were State Police barracks. Volunteers phoned the departments during the months of January and February and asked 10 different questions.